Nuclear-armed North Korea fired two short-range missiles into the Sea of Japan early Thursday morning, the Japanese and South Korean defense ministries said, in an apparent bid by Pyongyang to heap pressure on the U.S. amid stalled denuclearization talks.

"North Korea fired one short-range missile at around 5:34 a.m. and the other at 5:57 a.m., from the Hodo Peninsula near its eastern coastal town of Wonsan," the South Korean Joint Chiefs of Staff said in a statement.

The missiles fell into the sea before reaching Japan's exclusive economic zone and posed no security threat, Kyodo News reported, quoting a Japanese government source.